Scleral fixation of a novel modified, injected canine intraocular lens by haptic capture, in 17 dogs

Abstract

AbstractIntroductionThe aims of lens removal surgery are to re‐establish or preserve both a clear visual axis and emmetropic vision. Trans‐scleral intraocular lens (IOL) fixation has been described in cases where lens capsule instability precludes the insertion of a prosthetic intraocular lens into the lens capsule. Previous techniques have necessitated enlargement of the corneal incision to accommodate either a rigid polymethylmethacrylate IOL or an acrylic foldable IOL inserted using forceps. This paper reports the modification of an endocapsular IOL to be used as an injectable suture‐fixated IOL introduced through a 2.8 mm corneal incision.Materials and MethodsAll cases underwent lens extraction by phacoemulsification followed by removal of the unstable lens capsule. A PFI X4 IOL (Medicontur) was modified to create four open‐loop haptics. The IOL was injected into the anterior chamber, each haptic was captured in a loop of suture introduced ab externo, and the lens was sutured with four‐point fixation.ResultsThe results from 20 eyes in 17 dogs are reported. Over an average follow‐up time of 14.5 months, vision was retained in 16/20 eyes. Vision was lost in four eyes due to corneal ulceration and ocular hypertension (1/20), retinal detachment (2/20), and Progressive Retinal Atrophy (1/20).ConclusionsThe modified PFI X4 proved suitable for injection and scleral fixation through a 2.8 mm corneal incision, with a success rate comparable to previously published techniques.